Arbor-press.



E-E- BARTLETT.

ARBOR PRESS. APPLICATION man DEC-11.1913.

' Patented Apr. 20', 1915.

ing the base 10 and the cross-bar annon-rnnss. v

Specification of Letters Patent.

Patented Apr. 2c, 1915.

Application filed December 11, 1913. Serial No. 805,940.

2}; all whom it may concern i Be it known that I, EDWIN E. BARTLETT, ofHyde Park, in the county of Suffolk and State of Massachusetts, haveinvented cer-' tain new and useful Improvements in Ar bor-Presses, ofwhich the following is a specification.

My invention has reference particularly to improvements in that class ofpresses which are chiefly employed to affix wheels or similar machineparts to their arbors or mandrels, hence are commonly, and shallhereinafter be termed arbor presses.

The main object of the invention is to provide an arbor press which isadapted to operate upon work of greater length than has been possiblewith arbor presses heretofore constructed.

Other objects of the invention will appear from the followingdescription.

The invention consists in a universal centering and supporting deviceadapted to be readily applied to a standard type of arbor press andfurther consists in such other novel features as shall hereinafter bedescribed and pointed out in the claims.

Referring to the drawings :-Figure 1 represents a front elevation of amachine embodying my invention and, in dotted lines,

a wheel and its mandrel in positiim to be operated upon. Fig. 2represents a plan view of the centering and supporting device With itssupporting plate. Fig. 3 represents an enlarged sectional view taken onthe line 33 of Fig. 2. Fig. 4 represents an enlarged view of a portionof Fig. 1, partly in section.

Likereference characters designate corresponding parts throughout.

The frame of the press represented in the drawings is of a well knowntype, compris- 11supported above said base by the posts 12, 12.Extending through and guided by an aperture in the center of saidcross-bar is the,

vertical plunger 13 which may be operated through any suitable mechanismconnecting it with the hand wheel 14 and lever 15. As is common withthis type of press the base 10 supports the work plate 16 which extendspartly 'over the vertical mandrel receiving channel 17 in said base.Projecting from the base 10, at the lower end of said" channel, arethree brackets 18 which support the annular base plate 20 provided withthe cen tering and supporting device 19 at its cenporting member and atright ter. The latter consists of a semi-spherical supporting member 22which extends through and is supported by t pe sopket hearing 23 in thecenter of said base plate and extending diametrically through saidsupangles to its normally horizontal face 25 is the aperture 26. Adaptedto slide in said apertu ze is. the detent 27 provided with a pointedeiid"28 normally projecting above the face 25. Said detent is furtherprovided with a. collar 30 which is held in engagement with the shoulden31 in said aperture by the expansion spring 32 disposed between saidcollar and the end of the screw 33 threaded into the lower end of saidaperture, the shoulder 31 thereby limiting the upward movement of saiddetent. Clampe'd between the head of said screw and the supportingmember. 22 is the annular disk 35 of a greater diameter than that of theopening in the lower end of the socket bearing 23.

In the operation of the press the wheel or other machine part to whichthe mandrel is to be affixed may be placed upon the work plate ld andthen by means of the plunger 13 one end of the mandrel is forced downthrough the aperture in the wheel. When the length of the mandrel plusthe height of the gear is too great to place them in the press in thismanner the operation is performed by placing the center of one end ofthe mandrel, which is usually provided with a central conical depressiononto the projecting pointed end 28 of the detent 27, causing the latterto recede suiiiciently to allow the end of the mandrel to rest upon theface 25 of the supporting member 22; the

' wheel is then forced onto the end of the See rep In order to performthis latter operation the mandrel must be'placed in aposition so thatits axis will be in alinement with the axis pf the plunger. This isfacilitated by theuse of the detent 27 and as the supporting member 22may be movedfreely in its socket. its

supporting face 25 will be forcedtof adjust -itself to the end surface,of the mandrel by giving said the weight of the latter, thereby endsurface a; bearing throughout its area, irrespective of the angularposition of said end surface in. relation'to ,the axis of the mandrel.If a flat rigid support was em.

ployed it would not only be diilicudt to posh.

tion the mandrel, but it would often be im- 3. A centering andsupporting device possible for the end of the mandrel to have adapted tobe applied to an arbor press coma bearing surface throughout its area.prising a base plate, a semi-spherical mem 40 The placing of thesupporting member 92 her with its face normally horizontal ex- 5 in thechannel 17, besides allowing the use tending into a socket bearing insaid base of a comparatively long mandrel, makes use plate and providedwith an aperture at right of said channel as means for sustaining saidangles to said face, and aspring actuated mandrel in a substantiallyvertical position detent in said. aperture with its upper end 45 whilethe wheel or other machine part .is normally projecting above said face.being placed on its end preparatory to being, l. A centering andsupporting device operated upon by the plunger. comprising a base plate,a SQIHl-SPhQI'lCLLl The plate 35 limits the movement of the memberextending through a socket bearing supporting member- 22 in its socket.in said base plate, and a disk of greater di- 50 While I have shown butone form of my ameter than that of the lower end opening invention it isto be understood that this is in said socket bearing tangentiallysecured but one of many that might be employed to the spherical surfaceof said semi-spheriand still be within the scope of the following calmember below said socket bearing.

claims. 5. A centering and supporting device 55 I claim as new anddesire to secure by Letadapted to be applied to an arbo press comtersPatent: 1 prising a base plate, a senn-spherical mem- 1. In an arborpress the combination of a ber extending through a socket bearing inplunger, a base said plunger adapted to be said base plate and providedwith an aperreciprocated to operate on work placed upon ture at rightangles to its face, a spring actu- 60 said base, a mandrel receivingchannel in ated detent in said aperture with its upper said base and amandrel supportnear the end normally projecting above said face, a lowerend of said channel. disk of greater diameter than that of the 2. In anarbor press the combination of a lower end opening in said socketbearing plunger, a supporting member for supporttangentially secured tothe spherical surface 55 ing a mandrel or othermachine. part, said ofsaid semi-spherical member below said plunger adapted to bereciprocatedto opsocket bearing by a screw threaded into the crate onwork placed upon said base,said lower end of said aperture.

supporting member adapted to adjust itself In testimony whereof I haveailixed my to move its supporting-face into the plane signature, inpresence of two witnesses.

of the lower end surface of the said machine EDWIN E. BARTLETT. 0 v

part when the latter is placed on said sup- 'rtncsses: porting 'memberpreparatory to the opera- LEWIS G. SEMrLn, .tion of said plunger. ROLFE. H. CHRISTENSEN;

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

